The interferometer for emission and solar absorption (INTESA) is an infrared spectrometer designed to study radiative transfer in the troposphere and lower stratosphere from a NASA ER-2 aircraft. The Fourier-transform spectrometer (FTS) operates from 0.7 to 50 μm with a resolution of 0.7 cm<sup>−1</sup>. The FTS observes atmospheric thermal emission from multiple angles above and below the aircraft. A heliostat permits measurement of solar absorption spectra. INTESA’s calibration system includes three blackbodies to permit in-flight assessment of radiometric error. Results suggest that the in-flight radiometric accuracy is ~0.5 K in the mid-infrared.
© 2001 Optical Society of America
(000.2170) General : Equipment and techniques
(010.3920) Atmospheric and oceanic optics : Meteorology
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(280.0280) Remote sensing and sensors : Remote sensing and sensors
David W. Keith, John A. Dykema, Haijun Hu, Larry Lapson, and James G. Anderson, "Airborne Interferometer for Atmospheric Emission and Solar Absorption," Appl. Opt. 40, 5463-5473 (2001)